Temperature State of the Flow-Through Part of a T-125/150 PGU-450 Steam Turbine Operating in the Steam-Free and Motor Regimes

Arakelyan, E. K.; Bezdelgin, I. O.; Andryushin, K. A.

doi:10.1007/s10749-015-0617-z

Cited by 8 publications

(9 citation statements)

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“…When operating a CCGT in condensing mode, MM can be used as a method of reserving the CCGT power during gaps in the power consumption schedule, during emergency and short-term shutdowns (for 8-10 hours) of gas turbines. As shown by the calculated studies of the temperature state of the turbine stages T-150-7 PGU-450 in MM, the scheme proposed in [5] for supplying cooling steam to the turbine during its operation in MM at a pressure in the condenser of 0.004-0.008 MPa provides a deviation of the metal temperature of the turbine stages by no more than 30-35 °C relative to the temperature of the nominal mode. One of the features of the operation of the steam turbine in MM is the ability to control its thermal condition by changing the costs and parameters of the cooling steam flows that allows before its start to create the necessary thermal condition steam inlet elements of the steam turbine corresponding to the starting requirements of the user to produce steam from waste heat boilers at start-up CCGT from a stopped state.…”

Section: Research Resultsmentioning

confidence: 99%

“…To successfully solve the problem of reducing the duration of start-up operations of the steam turbine and CCGT in general, in the CCGT power reserve modes, when passing load gaps for steam turbines, a non-steam mode is recommended [5,6]. Its essence consists in stopping the steam supply to the turbine without disconnecting the generator from the network, which leads to idle rotation of the turbine rotor.…”

Section: Research Resultsmentioning

confidence: 99%

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Increasing the reliability and manoeuvrability of the CCGT when operating in the variable part of the power consumption schedules by switching the CCGT steam turbine to the motor mode

et al. 2020

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The report is devoted to the problem of increasing the reliability and manoeuvrability of the CCGT when it operates in power control modes of the power system. The generalized results of research on improving the reliability and expanding the adjustment range of the PGU-450 based on the use of bypass steam distribution, reducing the duration of start-up operations and increasing the loading speed of the steam turbine and CCGT in general in the modes of CCGT power reserve during the night load gap by transferring the CCGT steam turbine to the motor mode when the CCGT operates in the condensation mode or in the heating mode according to the GTU-CHP scheme are presented. Additional advantages of the motor mode are noted: improved reliability of the steam turbine due to the elimination of cyclic temperature fluctuations of its steam inlet valves and vibrations in the last stages of the low-pressure cylinder and the possibility of operating the steam turbine generator in the synchronous compensator mode.

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Section: Research Resultsmentioning

confidence: 99%

Section: Research Resultsmentioning

confidence: 99%

Increasing the reliability and manoeuvrability of the CCGT when operating in the variable part of the power consumption schedules by switching the CCGT steam turbine to the motor mode

et al. 2020

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“…3). Под МПР условно понимается такой режим работы ступени или группы ступеней турбины, при котором в ступенях отсутствует положительный теплоперепад в движущемся вдоль проточной части потоке пара, который в этом случае подается специально для охлаждения ступеней (или он возникает вследствие протечки пара уплотнения) [17,18]. Разогрев ступеней турбины обусловлен наличием при холостом вращении ступеней потерь тепла на трение и вентиляцию.…”

Section: малопаровой режим цвд паровой турбиныunclassified

“…Как известно, понятие «маневренность» это комплекс технических показателей и означает способность оборудования выполнять переменный суточный график электрической нагрузки и включает, помимо регулировочного диапазона, следующие характеристики: мобильность -скорость изменения нагрузки в минуту (абсолютная или в процентах номинальной мощности); пусковые характеристики энергоблокадлительность пусков после простоев в резерве различной длительности; вероятность успешного пуска в соответствии с нормативными графиками пуска; пусковые потери топлива. При большей продолжительности пусковых операций неоправданно возрастают пусковые потери, снижается отпуск электроэнергии и затрудняется организация работы эксплуатационного персонала [21][22][23][24].…”

Section: разработка и исследование способов повышения маневренности пгуunclassified

Ways to increase the maneuverability characteristics of the CCGT when operating in load control modes (for example, CCGT-450)

Arakelyan

2023

«Izvestiya vysshikh uchebnykh zavedenii. PROBLEMY ENERGETIKI»

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THE PURPOSE The article is devoted to the analysis of the problems that arise during the operation of heating CCGTs of the type CCGT-450 at reduced loads with their participation in the regulation of electrical and thermal loads. The description of the main limitations of the adjustment range of gas turbines, and the maneuverability characteristics of the CCGT, an analysis of some existing technical proposals for expanding the adjustment range is given. It is shown that the application of these proposals, expanding the boundaries of the adjustment range in small quantities, does not solve the problem as a whole. The description and research results of the proposed new technical solutions to expand the adjustment range and maneuverability characteristics of the CCGT - 450 are given.METHODS. When solving the tasks, the analysis, comparison and generalization of energy characteristics, modeling of modes were carried out.RESULTS. It is shown that: the use of methods for converting part of the central heating system and the central heating system as a whole of the T-125/150 steam turbine into a low-steam mode together with bypass steam distribution will expand the adjustment range to a level comparable to the adjustment range of condensing power units on gas-fuel oil;. when shutting down the CCGT-450 operating in condensation mode and when operating it in the GTU-CHP mode during periods of night failure of the electrical load, the conversion of the steam turbine to motor mode significantly improves the maneuverability and reliability characteristics of the steam turbine and the CCGT as a whole. conclusion. The use of methods for transferring part of the central heating system and central heating system as a whole and bypass steam distribution expand the adjustment range of the CCGT-450, respectively, by 7.8, 10.1 and 16.0% of the rated power; When the CCGT-450 is operating in condensation mode when the CCGT is stopped and when it is operating in the GTU-CHP mode during periods of night failure of the electric load, the steam turbine is transferred the MR significantly improves the maneuverability and reliability characteristics of the steam turbine by reducing the duration of start-up and loading of the steam turbine by 40 and 14.5 minutes, respectively, reducing starting fuel losses, eliminating temperature fluctuations of steam and metal of the steam intake organs of the central pump and the control stage during start-up;

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“…Electrical faults in shortcircuit or open-circuit windings, mechanical faults in eccentric or bearing damage, permanent magnet demagnetization faults, and coupling faults in which multiple faults affect each other, resulting in a variety of motor faults and coupling characteristics. [11][12][13][14][15][16][17][18][19][20][21] Figure 1 illustrates the coupling methods for multiphysics faults. There are many intricate and strong correlations between the internal structures of the motor.…”

Section: Introductionmentioning

confidence: 99%

Review of intelligent fault diagnosis for permanent magnet synchronous motors in electric vehicles

Xue

Zhang

et al. 2014

Advances in Mechanical Engineering

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Permanent magnet synchronous motors are the main power output components of electric vehicles. Once a failure occurs, it will affect the vehicle’s power, stability, and safety. While as a complex field-circuit coupling system composed of machine-electric-magnetic-thermal, the permanent magnet synchronous motor of electric vehicle has various operating conditions and complicated condition environment. There are various forms of failure, and the signs of failure are crossed or overlapped. Randomness, secondary, concurrency, and communication characteristics make it difficult to diagnose faults. Based on the research of a list of related references, this article reviews the methods of intelligent fault diagnosis for electric vehicle permanent magnet synchronous motors. The research status and development trend of fault diagnosis are analyzed. It provides theoretical basis for motor fault diagnosis and health management in multi-variable working conditions and multi-physics environment.

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Temperature State of the Flow-Through Part of a T-125/150 PGU-450 Steam Turbine Operating in the Steam-Free and Motor Regimes

Cited by 8 publications

References 0 publications

Increasing the reliability and manoeuvrability of the CCGT when operating in the variable part of the power consumption schedules by switching the CCGT steam turbine to the motor mode

Increasing the reliability and manoeuvrability of the CCGT when operating in the variable part of the power consumption schedules by switching the CCGT steam turbine to the motor mode

Ways to increase the maneuverability characteristics of the CCGT when operating in load control modes (for example, CCGT-450)

Review of intelligent fault diagnosis for permanent magnet synchronous motors in electric vehicles

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